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Split PDF by Size
Make smaller parts (10MB / 5MB / 2MB targets)

Split a large PDF into smaller parts that fit common upload or email limits. Use the built-in size helper to estimate pages per part, then download each part.

Exact MB splits vary by content (images vs text). If you need a tighter result, split first, then compress each part.

Start — Split by SizeHow it works (3 steps)
  • Split into parts near a target MB
  • Helper estimates pages per part
  • No signup, no watermark
  • Local processing in your browser
Upload one PDF to get started.
Size targets are an estimate based on average bytes per page. Image-heavy PDFs vary more — use compression if you need tighter limits.
We’ll generate a new PDF containing only your selected pages.

Why split a PDF by size?

Many people need PDFs under a limit for email or portals. Competitors even offer dedicated split-by-size tools — so this page matches that intent with an on-page size helper.

  • Split large PDFs into smaller parts for upload limits
  • Target common sizes like 10MB, 5MB, 2MB (estimate)
  • Download one part at a time
  • Pair with compression for stricter limits

Size helper (estimate) built in

Set a target MB per part and the tool estimates pages per chunk.

Download each chunk as its own PDF.

Open Split-by-Size Tool

Common reasons to split by size

These are the high-intent situations behind ‘split PDF by size’ searches.

Email attachment size issues

If attachments are too big, splitting into smaller PDFs can help before sending.

Portal uploads with strict caps

Universities, visa portals, and forms often reject large PDFs.

Large scanned documents

Scans can be heavy. Split into parts and compress if needed.

Share big reports in parts

Split a long report into multiple smaller PDFs for easier sharing.

Split PDF into 10MB / 5MB / 2MB parts (estimate)

The tool estimates chunk size using average bytes per page. Image-heavy pages vary more, so treat it as a starting point.

If you need to hit a strict number, split first, then compress each part.

Need tighter control? Split + compress

For strict portals, the winning workflow is: split into parts → compress each part → upload.

Use Compress PDF after you download a part to reduce file size further.

How to split a PDF by size (3 steps)

  1. 1) Upload your PDF

    Upload your PDF. Processing runs locally in your browser.

  2. 2) Select pages

    Set a target MB per part and select/download each chunk.

  3. 3) Download your new PDF

    If needed, compress each part for tighter size limits.

Privacy & security

This tool processes pages locally in your browser. That means:

  • No signup — use the tool instantly.
  • No watermark — your output is clean.
  • Local processing — pages are handled on your device.
  • Close the tab to clear the session from memory.

Split PDF by Size — FAQs

How do I split a PDF by file size?
Upload the PDF, set a target MB per part, then select and download each chunk. Repeat for the next part.
Is the split size exact?
No. Output varies by page content (especially images). The helper is an estimate based on average page size.
How can I get closer to an exact limit?
Split first, then compress each downloaded part using Compress PDF.
Can I target 10MB parts for email?
Yes. Set 10MB and download each chunk. Many email providers cap attachments, so splitting can help.
Is my PDF uploaded?
No. Splitting runs locally in your browser.
Does it work on mobile?
Yes. Works on Safari (iOS) and Chrome (Android).

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